|
Title
|
|
|
|
Observation of a peaking structure in the mass spectrum from decays
| |
|
Author
|
|
|
|
| |
|
Institution/Organisation
|
|
|
|
CMS Collaboration
| |
|
Abstract
|
|
|
|
| A peaking structure in the J/psi phi mass spectrum near threshold is observed in B-+/- -> J/psi phi K-+/- decays, produced in pp collisions at root s = 7 TeV collected with the CMS detector at the LHC. The data sample, selected on the basis of the dimuon decay mode of the J/psi, corresponds to an integrated luminosity of 5.2 fb(-1). Fitting the structure to an S-wave relativistic Breit-Wigner lineshape above a three-body phase-space nonresonant component gives a signal statistical significance exceeding five standard deviations. The fitted mass and width values are m = 4148.0 +/- 2.4 (stat.) +/- 6.3 (syst.) MeV and Gamma = 28(-11)(+15) (stat.) +/- 19 (syst.) MeV, respectively. Evidence for an additional peaking structure at higher J/psi phi mass is also reported. (C) 2014 The Authors. Published by Elsevier B.V. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Physics letters : B. - Amsterdam, 1967, currens
| |
|
Publication
|
|
|
|
Amsterdam
:
North-Holland
,
2014
| |
|
ISSN
|
|
|
|
0370-2693
| |
|
DOI
|
|
|
|
10.1016/J.PHYSLETB.2014.05.055
| |
|
Volume/pages
|
|
|
|
734
(2014)
, p. 261-281
| |
|
ISI
|
|
|
|
000338943900051
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|